package com.qingge.springboot.controller;


import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.poi.excel.ExcelReader;
import cn.hutool.poi.excel.ExcelUtil;
import cn.hutool.poi.excel.ExcelWriter;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.qingge.springboot.common.Constants;
import com.qingge.springboot.common.Result;
import com.qingge.springboot.controller.dto.UserDTO;
import com.qingge.springboot.utils.TokenUtils;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import com.qingge.springboot.service.IUserService;
import com.qingge.springboot.entity.User;

import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

/**
 * <p>
 *  前端控制器
 * </p>
 *
 * @author 青哥哥
 * @since 2023-02-05
 */
@RestController
@RequestMapping("/user" )
public class UserController {

    @Resource
    private IUserService userService;

    @PostMapping("/login")
    public Result login(@RequestBody UserDTO userDTO){
        String username = userDTO.getUsername();
        String password = userDTO.getPassword();
        if(StrUtil.isBlank(username) ||StrUtil.isBlank(password)){ // 如果用户名或密码为空
            return Result.error(Constants.CODE_400,"参数错误");
        }
        UserDTO dto = userService.login(userDTO);
        return Result.success(dto);
    }

    @PostMapping("/register")
    public Result register(@RequestBody UserDTO userDTO){
        String username = userDTO.getUsername();
        String password = userDTO.getPassword();
        if(StrUtil.isBlank(username) ||StrUtil.isBlank(password)){ // 如果用户名或密码为空
            return Result.error(Constants.CODE_400,"参数错误");
        }
        return Result.success(userService.register(userDTO));
    }

    // 新增或者更新
    @PostMapping
    public Result save(@RequestBody User user){
        return Result.success(userService.saveOrUpdate(user));
    }

    @DeleteMapping("/{id}" )
    public Result delete(@PathVariable Integer id){
        return Result.success(userService.removeById(id));
    }

    @PostMapping("/del/batch" )
    public boolean deleteBatch(@RequestBody List<Integer> ids){
        return userService.removeByIds(ids);
    }

    @GetMapping
    public Result findAll(){
        return Result.success(userService.list());
    }

    @GetMapping("/{id}" )
    public User findOne(@PathVariable Integer id){
        return userService.getById(id);
    }

    @GetMapping("/username/{username}" )
    public Result findOne(@PathVariable String username){
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("username",username);
        return Result.success(userService.getOne(queryWrapper));
    }

    @GetMapping("/page" )
    public Page<User> findPage(@RequestParam Integer pageNum,
                               @RequestParam Integer pageSize,
                               @RequestParam(defaultValue = "") String username,
                               @RequestParam(defaultValue = "") String email,
                               @RequestParam(defaultValue = "") String address){
        QueryWrapper<User> queryWrapper=new QueryWrapper<>();
        if (!"".equals(username)){
            queryWrapper.like("username",username);
        }
        if (!"".equals(email)){
            queryWrapper.like("email",email);
        }
        if (!"".equals(address)){
            queryWrapper.like("address",address);
        }
        queryWrapper.orderByDesc("id" );
        // 获取当前用户信息
        User currentUser = TokenUtils.getCurrentUser();
        System.out.println("获取当前用户信息====================="+currentUser.getUsername());
        return userService.page(new Page<>(pageNum,pageSize),queryWrapper);
    }
    /**
     * 导出接口 (导出数据库中数据)
     */
    @GetMapping("/export")
    public void export(HttpServletResponse response) throws Exception{
        // 从数据库查询出所有的数据
        List<User> list=userService.list();
        // 通过工具类创建writer 写出到磁盘路径
        // ExcelWriter writer= ExcelUtil.getWriter(fileUploadPath+"用户信息.xlsx");
        // 在内存操作，写出到浏览器
        ExcelWriter writer=ExcelUtil.getWriter(true);
        // 自定义标题别名
        writer.addHeaderAlias("username","用户名");
        writer.addHeaderAlias("password","密码");
        writer.addHeaderAlias("nickname","昵称");
        writer.addHeaderAlias("email","邮箱");
        writer.addHeaderAlias("phone","电话");
        writer.addHeaderAlias("address","地址");
        writer.addHeaderAlias("createTime","创建时间");
        writer.addHeaderAlias("avatarUrl","头像");

        // 一次性写出list内的对象到excel，使用默认样式，强制输出结果
        writer.write(list,true);

        // 设置浏览器响应的格式
        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8");
        String fileName = URLEncoder.encode("用户信息", "UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");

        ServletOutputStream out=response.getOutputStream();
        writer.flush(out,true);
        out.close();
        writer.close();
    }
    /**
     * 导入接口
     */
    @PostMapping("/import")
    public Boolean imp(MultipartFile file)throws Exception{
        InputStream inputStream=file.getInputStream();
        ExcelReader reader=ExcelUtil.getReader(inputStream);
        // 方式1：(推荐) 通过 javabean的方式读取Excel内的对象，但是要求表头必须是英文，跟javabean的属性要对应起来
        //List<User> list=reader.readAll(User.class);
        // 方式2：忽略表头的中文，直接读取表的内容
        List<List<Object>> list = reader.read(1);
        List<User> users = CollUtil.newArrayList();
        for (List<Object> row : list) {
            User user = new User();
            user.setUsername(row.get(0).toString());
            user.setPassword(row.get(1).toString());
            user.setNickname(row.get(2).toString());
            user.setEmail(row.get(3).toString());
            user.setPhone(row.get(4).toString());
            user.setAddress(row.get(5).toString());
            user.setAvatarUrl(row.get(6).toString());
            users.add(user);
        }
        userService.saveBatch(users);
        return true;
    }
}

